AUGUSTA, Ga.  Masters Monday is a lot like the first day of school. You won't catch any yellow buses motoring down Magnolia Lane, but for the players it's a chance to ease into the week and catch up with friends before the real work begins. Guys schmooze on the practice green and chitchat in the locker room. The old guardlegends like Arnie, Gary, and Fuzzymosey about the clubhouse, while wide-eyed freshmen like U.S. Amateur champion Peter Uihlein, 19-year-old Hideki Matsuyama of Japan, and the 18 other Masters rookies, do their best to remain cool. Or at least look cool. And above it all, the grounds hum with speculation and anticipation, because for the next three days at least, anything is possible.